“became clear that mirror neurons explained many previously unexplainable aspects of the mind, such as empathy, imitation, synchrony, and even the development of language. One writer compared mirror neurons to “neural WiFi”9—we pick up not only another person’s movement but her emotional state and intentions as well. When people are in sync with each other, they tend to stand or sit in similar ways, and their voices take on the same rhythms. But our mirror neurons also make us vulnerable to others’ negativity, so that we respond to their anger with fury or are dragged down by their depression.”